نتایج جستجو برای: gpr attributes comprising of instantaneous amplitude

تعداد نتایج: 21171929  

2015
Allyson Kelley Jennifer Giroux Mark Schulz Bob Aronson Debra Wallace Ronny Bell Sharon Morrison

OBJECTIVE To compare American-Indian and Caucasian mortality rates from diabetes among tribal Contract Health Service Delivery Areas (CHSDAs) in the Great Plains Region (GPR) and describe the disparities observed. RESEARCH DESIGN AND METHODS Mortality data from the National Center for Vital Statistics and Seer*STAT were used to identify diabetes as the underlying cause of death for each deced...

Journal: :Revista brasileira de fisioterapia (Sao Carlos (Sao Paulo, Brazil)) 2011
Rosana M Teodori Júlia R Negri Mônica C Cruz Amélia P Marques

BACKGROUND The Global Postural Re-education (GPR) method has been widely used in clinical practice, with reported benefits for prevention and rehabilitation of musculoskeletal dysfunctions. In parallel with almost two decades of clinical implementation, research studies have tested and verified the effectiveness of GPR in treating different clinical conditions and have also compared this method...

2013
Jungang Yang Tian Jin Xiaotao Huang Hongqiang Wang

MIMO array can obtain much more equivalent elements by using a small number of transmitters and receivers. However, according to traditional sampling theorem, a certain number of transmitters and receivers are still needed to obtain a dense equivalent array. Since the interesting targets of ground penetrating radar (GPR) are usually sparse, this paper presents a spare MIMO array GPR imaging sch...

Journal: :IEEE Trans. Geoscience and Remote Sensing 2010
Foroohar Foroozan Amir Asif

In this paper, first, a new range-estimation technique using time reversal (TR) for ground-penetrating-radar (GPR) applications is presented. The estimator is referred to as the TR/GPR range estimator. The motivation for this paper comes from the need of accurately estimating the location of underground objects such as landmines or unexploded ordinance for safe clearance. Second, the Cramér–Rao...

Journal: :IEEE Trans. Geoscience and Remote Sensing 2001
Levent Gürel Ugur Oguz

The versatility of the three-dimensional (3–D) finitedifference time-domain (FDTD) method to model arbitrarily inhomogeneous geometries is exploited to simulate realistic groundpenetrating radar (GPR) scenarios for the purpose of assisting the subsequent designs of high-performance GPR hardware and software. The buried targets are modeled by conducting and dielectric prisms and disks. The groun...

Journal: :فیزیک زمین و فضا 0
حامد محمدآبادی کارشناس ارشد ژئوفیزیک، لرزه شناسی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران علی عدالت دکترای ژئوفیزیک، لرزه شناسی، شرکت نفت و گاز پارس، تهران، ایران حمیدرضا سیاه کوهی دانشیار، گروه فیزیک زمین، موسسه ژئوفیزیک دانشگاه تهران، ایران

faults/fractures detection is an essential step of the full field study in hydrocarbon reservoir. definition of exact location of these structural events is a critical step to optimize location of the development wells. despite of the fast development of the geo science technology and oil industry in recent years, detection of the small geological events such as faults and fractures in some of ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده عمران 1389

دستگاه gpr(ground penetrating radar) بر اساس تئوری الکترومغناطیس عمل نموده و پروفیل‏هایی را از سطوح داخلی محیط برداشت شده ارایه می‏دهد . gpr شامل آنتن گیرنده و فرستنده است که آنتن فرستنده پالس الکترومغناطیس را در سطح زیرین زمین انتشار می‏دهد و سپس از روی سطوح مواد مختلف به دلیل اختلاف در ثابت دی‏الکتریک آن‏ها انعکاس می‏یابد. انرژی منعکس شده به طرف سطح زمین حرکت کرده و توسط آنتن گیرنده ثبت می‏گر...

2012
A. V. Hebsur

Keeping track of underground utilities through maps or real physical signs is essential for their maintenance and quick repairs, whenever required, without causing much obstruction to day to day life. It is not uncommon that maps are misplaced or real physical signs are destroyed. In such situations, digging and excavation becomes unavoidable during repair works. Ground penetrating radar (GPR) ...

2017
Chieh Chou Aaron Kingery Di Wang Haifeng Li Dezhen Song

We report system and algorithmic development for a sensing suite comprising multiple sensors for both surface and subsurface transportation infrastructure inspection where we focus on multi-modal mapping for inspection. The sensing suite contains both inspection sensors, such as a camera and a ground penetrating radar (GPR), and navigational sensors, such as a wheel encoder or a global position...

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